Dehydrogenation of cyclohexenes to cyclohexadienes by [(PPh3)(2)Rh](+). The isolation of an intermediate in the dehydrogenation of cyclohexane to benzene: crystal structure of [(eta(4)-C6H8)Rh(PPh3)(2)][closo-CB11H6Br6]

Reference:

Rifat, A., Mahon, M. F. and Weller, A. S., 2003. Dehydrogenation of cyclohexenes to cyclohexadienes by [(PPh3)(2)Rh](+). The isolation of an intermediate in the dehydrogenation of cyclohexane to benzene: crystal structure of [(eta(4)-C6H8)Rh(PPh3)(2)][closo-CB11H6Br6]. Journal of Organometallic Chemistry, 667 (1-2), pp. 1-4.

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Abstract

Treatment of the arene bridged dimer [(PPh3)(2)Rh](2)[closo-CB11H6Br6](2) with eight equivalents of cyclohexene affords [(eta(4)- C6H8)Rh(PPh3)(2)][closo-CB11H6Br6] with the concomitant formation of one equivalent of cyclohexane, while 1-methylcyclohexane and 4-methylcyclohexane both give 2-methylcyclohexa-1,3-diene complexes; all of these products are intermediates in the catalytic dehydrogenation pathway of cyclohexane to benzene. (C) 2002 Elsevier Science B.V. All rights reserved.